Getting the wrong springs in a box is very common. I wanted Moog 6320 springs, but heard 6308 boxes were discovering 6320 inside (same rate springs, but 6320 are taller). So I found 6308s on Amazon cheaper than 6320s, ordered them and sure enough, 6320s were inside the 6308 box
they fit great and put the car at the ride height I wanted.
So do you research on the number of coils, bar diameter and resting height, and make sure you get what you ordered!